linux-kernel - [PATCH v2] scripts/gdb: De-reference per-CPU MCE interrupts

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Message-ID: <20250625021109.1057046-1-florian.fainelli@broadcom.com>
Date: Tue, 24 Jun 2025 19:11:08 -0700
From: Florian Fainelli <florian.fainelli@...adcom.com>
To: linux-kernel@...r.kernel.org
Cc: Florian Fainelli <florian.fainelli@...adcom.com>,
	Jan Kiszka <jan.kiszka@...mens.com>,
	Kieran Bingham <kbingham@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH v2] scripts/gdb: De-reference per-CPU MCE interrupts

The per-CPU MCE interrupts are looked up by reference and need to be
de-referenced before printing, otherwise we print the addresses of the
variables instead of their contents:

MCE: 18379471554386948492   Machine check exceptions
MCP: 18379471554386948488   Machine check polls

The corrected output looks like this instead now:

MCE:          0   Machine check exceptions
MCP:          1   Machine check polls

Fixes: b0969d7687a7 ("scripts/gdb: print interrupts")
Signed-off-by: Florian Fainelli <florian.fainelli@...adcom.com>
---
Changes in v2:

- explain in more details what is being fixed and how this corrects
  the output

 scripts/gdb/linux/interrupts.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/gdb/linux/interrupts.py b/scripts/gdb/linux/interrupts.py
index 492d1f1e9529..f4f715a8f0e3 100644
--- a/scripts/gdb/linux/interrupts.py
+++ b/scripts/gdb/linux/interrupts.py
@@ -110,7 +110,7 @@ def x86_show_mce(prec, var, pfx, desc):
     pvar = gdb.parse_and_eval(var)
     text = "%*s: " % (prec, pfx)
     for cpu in cpus.each_online_cpu():
-        text += "%10u " % (cpus.per_cpu(pvar, cpu))
+        text += "%10u " % (cpus.per_cpu(pvar, cpu).dereference())
     text += "  %s\n" % (desc)
     return text
 
-- 
2.43.0